FreeMarker Editor in eclipse 3.5 giving Illegal Argument Exception

Question

I am trying to use the freemarker editor in eclipse 3.5 Galileo and found the exception :

java.lang.IllegalArgumentException: Argument not valid
    at org.eclipse.swt.SWT.error(SWT.java:3865)
    at org.eclipse.swt.SWT.error(SWT.java:3799)
    at org.eclipse.swt.SWT.error(SWT.java:3770)
    at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:9029)
    at org.eclipse.swt.custom.StyledText.setStyleRanges(StyledText.java:9123)
    at org.eclipse.jface.text.TextViewer.applyTextPresentation(TextViewer.java:4801)
    at org.eclipse.jface.text.TextViewer.changeTextPresentation(TextViewer.java:4853)
    at org.eclipse.jface.text.presentation.PresentationReconciler.applyTextRegionCollection(PresentationReconciler.java:579)
    at org.eclipse.jface.text.presentation.PresentationReconciler.processDamage(PresentationReconciler.java:568)
    at org.eclipse.jface.text.presentation.PresentationReconciler.access$3(PresentationReconciler.java:564)
    at org.eclipse.jface.text.presentation.PresentationReconciler$InternalListener.inputDocumentChanged(PresentationReconciler.java:119)
    at org.eclipse.jface.text.TextViewer.fireInputDocumentChanged(TextViewer.java:2870)
    at org.eclipse.jface.text.TextViewer.setDocument(TextViewer.java:2919)
    at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:545)
    at org.eclipse.jface.text.source.SourceViewer.setDocument(SourceViewer.java:500)
    at org.eclipse.ui.texteditor.AbstractTextEditor.initializeSourceViewer(AbstractTextEditor.java:3951)
    at org.eclipse.ui.texteditor.AbstractTextEditor.createPartControl(AbstractTextEditor.java:3466)
    at org.eclipse.ui.texteditor.StatusTextEditor.createPartControl(StatusTextEditor.java:53)
    at org.eclipse.ui.texteditor.AbstractDecoratedTextEditor.createPartControl(AbstractDecoratedTextEditor.java:427)
    at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:662)
    at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:462)
    at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:595)
    at org.eclipse.ui.internal.EditorReference.getEditor(EditorReference.java:286)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2857)
    at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2762)
    at org.eclipse.ui.internal.WorkbenchPage.access$11(WorkbenchPage.java:2754)
    at org.eclipse.ui.internal.WorkbenchPage$10.run(WorkbenchPage.java:2705)
    at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2701)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2685)
    at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2676)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651)
    at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610)
    at org.eclipse.ui.internal.ide.handlers.OpenResourceHandler.execute(OpenResourceHandler.java:129)
    at org.eclipse.ui.internal.ide.handlers.OpenResourceHandler.run(OpenResourceHandler.java:181)
    at org.eclipse.ui.internal.handlers.ActionDelegateHandlerProxy.execute(ActionDelegateHandlerProxy.java:289)
    at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
    at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
    at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.executeCommand(WorkbenchKeyboard.java:470)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.press(WorkbenchKeyboard.java:824)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.processKeyEvent(WorkbenchKeyboard.java:880)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.filterKeySequenceBindings(WorkbenchKeyboard.java:569)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard.access$3(WorkbenchKeyboard.java:510)
    at org.eclipse.ui.internal.keys.WorkbenchKeyboard$KeyDownFilter.handleEvent(WorkbenchKeyboard.java:125)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Display.filterEvent(Display.java:1191)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1002)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1027)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1012)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1040)
    at org.eclipse.swt.widgets.Widget.sendKeyEvent(Widget.java:1036)
    at org.eclipse.swt.widgets.Widget.wmChar(Widget.java:1368)
    at org.eclipse.swt.widgets.Control.WM_CHAR(Control.java:4053)
    at org.eclipse.swt.widgets.Canvas.WM_CHAR(Canvas.java:346)
    at org.eclipse.swt.widgets.Control.windowProc(Control.java:3946)
    at org.eclipse.swt.widgets.Canvas.windowProc(Canvas.java:342)
    at org.eclipse.swt.widgets.Display.windowProc(Display.java:4589)
    at org.eclipse.swt.internal.win32.OS.DispatchMessageW(Native Method)
    at org.eclipse.swt.internal.win32.OS.DispatchMessage(OS.java:2410)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3471)
    at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)
    at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)
    at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:368)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)

I replaced the freemarker jar in plugin directory and I am using clean option also .. but couldn't find anything...

Answer 1

FreeMarker is a bit old (latest release in December 2008).

Can you check you reproduce the problem with eclipse Ganymede 3.4(.x), that is older version, or eclipse 3.5.1 (more recent)?
SWT might have evolve in non-compatible way since then. Or it might just be an old bug still un-resolved (like the 115253 one, or the 287886, which should have been fixed in 282218, but for Mac and probably only in 3.5.1).

Answer 2

There's no mention of Freemarker classes in the above stack trace. What editor are you using?

I have Eclipse 3.5.20090621-0832 and Freemarker IDE 1.1.0.M1-N200906060434-H241 and both are working fine. Freemarker IDE is part of JBoss Tools.

You can get the latest development milestone (stable releases only support Eclipse 3.4.2) - note that it requires Eclipse 3.5.1 / Galileo SR1.

Or, if you're using Eclipse's built-in package management, update site is here along with installation instructions